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WOT 24-26mph @4000rpm
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- CYO Supporter
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- Vessel Info: 1998 Carver 355
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Re: WOT 24-26mph @4000rpm
the merc fuel injected 454's run about 170 unless you push it up near the pins, then it will hit 180. It comes back down instantly when rpms are reduced. As others have mentioned, check your strainers, but it is most likely impellers that need replaced.
- mjk1040
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- Vessel Info: 1998 355 AC/MY "Deja Vu"
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Re: WOT 24-26mph @4000rpm
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
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Re: WOT 24-26mph @4000rpm
mjk1040 wrote:Source of the post You mentioned cleaning your exchangers. My I suggest you go to the Sea Flush web sight and watch how they clean and descale your water systems. Won't cost you $200.00 if you buy the Sea Flush unit and some descaler. Mike
Thanks Mike. I ordered a kit. It looks like you just attach the kit to the strainer housing, start the motor, and keep it topped off with descaler. Then shut it down and let it sit for 2-4 hours (From the bottle instructions)... Any preferences on descaler?
(Edit) I see that Im supposed to use a shop vac to push the descaler in. Not start the engine.
- mjk1040
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Re: WOT 24-26mph @4000rpm
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
- hausherrs
- First Mate
- Posts: 107
- Joined: July 19th, 2016, 9:30 am
- Vessel Info: 1996 Carver 400
- Location: Seabrook TX
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Re: WOT 24-26mph @4000rpm
I have not replaced the fuel filters yet. I ordered them and they are on the way.
Im going to clean the strainers today. And descale the heat exchangers next week.
- mjk1040
- Admiral
- Posts: 1507
- Joined: July 30th, 2015, 8:15 am
- Vessel Info: 1998 355 AC/MY "Deja Vu"
- Location: Savannah, NY
- Has thanked: 9 times
- Been thanked: 236 times
Re: WOT 24-26mph @4000rpm
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
- hausherrs
- First Mate
- Posts: 107
- Joined: July 19th, 2016, 9:30 am
- Vessel Info: 1996 Carver 400
- Location: Seabrook TX
- Has thanked: 5 times
- Been thanked: 10 times
Re: WOT 24-26mph @4000rpm
mjk1040 wrote:Check the descaler your buying, some of it calls to remove your anodes before introducing the descaler, that means your going to need some plugs too.
Got it. Do you recall how many there are? I recall seeing two per engine.
- mjk1040
- Admiral
- Posts: 1507
- Joined: July 30th, 2015, 8:15 am
- Vessel Info: 1998 355 AC/MY "Deja Vu"
- Location: Savannah, NY
- Has thanked: 9 times
- Been thanked: 236 times
Re: WOT 24-26mph @4000rpm
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
- tonyiiiafl
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Re: WOT 24-26mph @4000rpm
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Re: WOT 24-26mph @4000rpm
tonyiiiafl wrote:Source of the post I have a 94 390 CPMY with twin Merc Bluewater's carbed. She runs @ 2800 about 14, and 25 GPH and 3300 about 18 @34GPH. I am on plane at 18. 160 T stat, and once up on 3400 it will run all day at 180 degrees with no issues. One has to remember, the heat exchanger has a small interface area! The alarm buzzers are set to chime in at 215, so even running at 200 is nothing to be concerned about, IMHO. As for WOT I hit 4 to 41oo AND top out at 28 to 30. Temp about 190. Cools right down after slowing down. Both new thermostats, and bottom is cleaned. I hope this helps someone. I am the second owner, sadly the first passed last July. He took loving care of this vessel and it shows.
Thanks for the info. The previous owner told me he serviced the heat exchangers a couple months before I bought it. I decided not to use the $80 bottle of barnacle buster yet. I pulled the caps off the strainers and they are spotless. Ill be replacing the fuel filters on the TBs today but other than that I’ll keep running it. The previous owner said that he had the props "Tuned". Hopefully that just means balanced and straightened.
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